Antifog polyester lidding film for cpet trays

Abstract

The present disclosure is directed to peelable, heat-sealable lidding films for containers of diverse polymer compositions storing various products such as foodstuffs and pharmaceuticals. The lidding films disclosed herein can be heat-sealed to crystalline polyester trays (CPET), easily peeled, and contain improved antifogging performance by incorporating a non-migratory antifogging additive into the heat sealable layer of the film without deteriorating seal strengths.

Description

CROSS REFERENCE TO RELATED APPLICATION[0001]This application is a divisional of U.S. application Ser. No. 15 / 476,413, filed Mar. 31, 2017, the entire contents of which is incorporated herein by reference.FIELD OF THE DISCLOSURE[0002]This disclosure relates to antifog polyester lidding films. More particularly, this disclosure relates to heat-sealable antifog polyester lidding films for crystalline polyester trays (CPET).BACKGROUND OF THE DISCLOSURE[0003]Sealed containers with food products such as pastas, salads, wraps, sandwiches, and fruit can provide a quick and convenient meal to consumers who crave something freshly made. As more and more ready-to-eat meals are available at grocery stores, consumers are overwhelmed with choices and frequently rely on product appearance in choosing their food. Many of these meals are packaged in plastic trays with sealed lids made out of highly transparent, flexible films. However, if the food product contains high amounts of water, the water ca...

AI Technical Summary

Benefits of technology

The patent describes a special lidding film that can be used to seal containers for food and medicine. The film is designed to prevent fogging when the product is kept cold before purchase and can be used in a microwave or oven. The film contains a special antifogging agent that is embedded in the heat-sealable layer of the film, allowing for clarity and preventing the product from getting contaminated. The film is easy to peel and maintains strong seals with the container. This technology helps to improve the quality and appearance of the products and ensures safe and easy handling.

Problems solved by technology

However, many times the polar molecules that bloom to the surface can impact seal strength and decrease it to an unwanted level.

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